Telephone-bracket.



PATENT'ED OUT. 23, 1906.

C. H. BORDEN. TELEPHONE BRACKET. APPLICATION FILED AUG.29,1905.

M r m w n V nfl a m m 2 SHEETS-SHEET 1.

O. H. BORDEN.

TELEPHONE BRACKET. APPLIOATIOIN FILED AUG.29,1905.

PATENTED 001*. 23, 1906.

2 SHEETS-SHEET 2.

In ventor 61421.55 HBmae/r.

y QM I Attys v ed a certain new and useful Improvement in =1) and l 2 are pivoted to swing vertically.

and counterbalarming-spring, such that the UNITED STATES rn'rnn'r orrron.

CHARLES H. BOB-DEN, OF STAMFORD, CONNECTTCUT.

TELEPHONE-BRACKET.

No. 834,104. Specification 0r Application filed Augu.-l W) To all whom it may concern:

Be it known that 1, CHARLES H. Bonnnn, a citizen of the United States of America, residing in Stamford, in the county of Fairfield and State of Connecticut, have invent- TelephoneBrackets, of which the following is a specification.

The improvement relates to that class of brackets for telephones or other articles which embody a parallel-ruler-motion device telephone can be raised and lowered and moved horizontally in 'various directions; and my invention relates more particularly to the compensating nieans whereby the holder will renain at any desired elevation.

My iirproved bracket, like many others, is adapted to be attached to any suilicicntlystrong stationary support, a wall or desk.

In the accompanying drawings, Figure 1 is an elevation of the holder. F ig. .Zis a horizontal section through. my in proved. compensating friction-cam. Fig. 3 is a side view of a portion of a parallel bar detached. Fig. 4 is a face View of the cam of Fig. 2. Fig- 5 is a view otthe cam-washer. Fig. 6 is a corresponding view of the disk spring. Fig. 7 is a sideelevation of a spring-adjusting means, and Fig. 8 is a plan view of the sauna with some of the parts separated and removed.

Referring to the drawings, A is a bracket intended to be secured to a desk, wall, or other suitable support, and it has a pin (1, extending vertically from it. On this pin is pivotally mounted a base or turn-tablo B, having slotted arms B and 13*, in which bars The outer ends of these bars are siirilarly pivoted to the telephone-support E at E and E. The support E preferably has a tubular part 1), which holds the telephone-base I (consisting of the stem C, which supports the transmitter T and the switch-hook H, upon. which the receiver R is hung) and permits it to be freely turned in a horizontal plane to bring the mouthpiece into any dosircd posit-ion. The arms or projections B, B, E, and E are so located that the bars I) and 1) can be raised to a vertical position, and they form a parallelogram the telephone will be held iiipright whatever the position of the bracket.

Any suitable cminterbalancing means maybe employed-as, for instance, a pair of Batters Patent. E Patented Oct. 23, 1906.

i905. Serial No. 276,249-

coiled springs G, which are shown mounted on; cylindrical projections B B on opposite sides of the base B adjacent to the art: 1 B. Each spring has one end G extended along the bar I) to engage a roller D, mounted on a pin 1)", secured in the bar. The other end G {of the spring is bent laterally to engage any one ol a series of holes 0 0 &c., in a rotarilyadjustable disk C This disk has a central opening 0 of hexagonal. or other regular polygonal form to lit a boss 5, Figs. 7 and 8, on the end of the projections B B and when put on this boss it is held in. place by a headed screw S. The holes 0 c c, &c., are at equal distances from the center of the disk, but at relatively less distances apart circumferentially than the radial lines a: as 00 &c., passing through the angles of the opening 0, as shown in Fig. 7. If the opening 0 were agonal, as shown, and the holes 0 c c, &c.,

hex-

spaced five-sixths of the distance from one radial line a: to the next'one, w, it is evident that if the disk were on the boss 6, as in Fig. 7, with the holec as shown, and then the disk were removed from the boss and turned to the left one-sixth ol'" the way around the next hole 0 would occupy a position one thirty-sixth of a circle in advance of that formerly taken by the hole 0. Turning the disk to the next position on b will give an advance of two thirty-sixths of a circle. If the disk is turhcd in the opposite direction, the reverse will occur. Hence if it is desired to increase the tension of the spring a trifle release the cndC from the roller 1), turn the screw S sul'liciently to allow the disk C? to be removed from the boss I), and then turn it one place to the left, put the next hole over the 0nd C of the spring, and then replace the disk, screw, and. other end G. If more tension is wanted, it can be had by further advancing the disk as just described. Of course each spring must be adjusted similarly. This device gives a line adjustment, though the parts are relatively coarse and strong.

it the bracket supporting the telephone were placed in its highest position, (i. e., with. the bars 1) D vertical,) it would require but little tension of the springs G to balance or hold it in place; but if it were lowered to a horizontal position a greatly-increased tension. of the springs would be needed, andif lowered still farther less and less power would be necessary to balance the telephone. will also be seen that as the bracket descends from the highest to the lowest point the ten sion of the springs will increase continually. In order to compensate for these variations in position of the bracket and tension of the springs and properly balance the telephone, the pivot E for. one of the bars D, is made in the forlnof bolt flattened on one side, as shown at 'i, and: [urns freely in the arm of the support E, but turns with the bar D, as the hole in the latter through which thebolt extends is made to fit it snugly. Mounted on the outer ,end of the bolt are two disks J and K, each having a cam-face on one'side, but plane on the other. The planeface of cam J is placed against the side of the arm E, and it is held from turning by a dowel-pin J. The hole in the center of this cam is round, thusperinitting the bolt to turn in it. Cam K is next put on the bolt with its cam-face next to that of cam J, and as its center hole 76 fits the bolt it is compelled to turn with it. Against the plane face ofcam K is put a disk or star spring L, which when pressed against said cam K by a nut I and lock-nut I will hold the-cams together with a yielding pressure. By this construction the camJ travels with the part E, while the cam K moves Witn the bar D. One of the cams-for instance, J-has a depression in its face, while the other cam K has a correspondingly raised When the bracket is at a horizontal position, these cams are located so that the part 76 is in the depression j, allowing spring G to exert its full power; but if the bracket should be raised it would cause this raised part 7c of the cam K to ride up out of the depression j ofcam J, and thus separate the cams, which in turn compress the spring L, and so offer resistance to the turning of the joint at E, and consequently overcome the power of spring Gin roportion to the strength of the sprin L anr inclination of the canisurfaces. T e same effect is produced by lowering the bracket below the horizontal.

The construction of the telephone-support at the end of the bracket forms the subject of a separate application filed by me Februar 8, 1906-, and bearing the Serial No. 300,165.

I claim as my invention 1. An adjustable bracket for telephones, &c., comprising a parallel-ruler-motion device with a counterbalancing-spring means,

sea.

in combination withfrictional cam-faces on relativelymovmg parts of the device, and a l spring to press the faces together, whereby t bars of said parallel-motion device, and on.

relatively movin parts of the device.

3. An adjusta le bracket for telephones, &c., comprising a parallel-ruler-motion device with a coimterbalancingspring means, iii-combination with frictioircams to compensate for the varying tension of the spring in the varying positions of the bracket, said friction-cams comprising two disks on relatively moving parts of the device and having cam-shaped bearing-faces and a spring, to press said disks together.

4. An adjustable bracket for telephones, &c., having a .parallel-ruler-motion device with a coiled counterbalancing-spring, in combination with a fixed symmetrically-polygonal pin, and a disk having an opening of corresponding shape to fit on the pin, and means of attaching the end of the spring to the disk. at spaced distances apart, relatively d ili ering from the spacing of .the points of the polygon.

5. An adjustable bracket for telephones, &c., having a parallel-rirler-motion device with counterbalanoing-spring means, in combination with means for regulating the tension of said spring means, said regulating means comprisin projections on the base of said parallel-ruier-rnotion device, coiled springs about said projections, and perforated disks at the ends of said projections through which the ends of saidsprings may ass, said disks being adapted to be adjusts rot-arily about the ends of said projections.

In testimony whereof I have signed my name to this specification'in the presence of twosubscribing witnesses.

o. n. isonnnn.

\Vitnesses WALTER R. BEACH, T

PAUL. H. BLAIR. 

